In arranging his thoughts and their visible forms Khepera was assisted by the goddess Maat, who is usually regarded as the goddess of law, order, and truth, and in late times was held to be the female counterpart of Thoth, "the heart of the god Ra." In this legend, however, she seems to play the part of Wisdom, as described in the Book of Proverbs,[FN#3] for it was by Maat that he "laid the foundation." [FN#3] "The Lord possessed me in the beginning of his way, before his works of old. I was set up from everlasting, from the beginning, or ever the earth was. When there were no depths I was brought forth . . . . . . . Before the mountains were settled, before the hills was I brought forth: while as yet he had not made the earth, nor the fields, nor the highest part of the dust of the world. When he prepared the heavens I was there: when he set a compass upon the face of the depth: when he established the clouds above: when he strengthened the fountains of the deep: when he gave to the sea his decree, . . . . . . when he appointed the foundations of the earth: then I was by him, as one brought up with him. . . . . . ." Proverbs, viii. 22 ff.} Having described the coming into being of Khepera and the place on which he stood, the legend goes on to tell of the means by which the first Egyptian triad, or trinity, came into existence. Khepera had, in some form, union with his own shadow, and so begot offspring, who proceeded from his body under the forms of the gods Shu and Tefnut. According to a tradition preserved in the Pyramid Texts[FN#4] this event took place at On (Heliopolis), and the old form of the legend ascribes the production of Shu and Tefnut to an act of masturbation. Originally these gods were the personifications of air and dryness, and liquids respectively; thus with their creation the materials for the construction of the atmosphere and sky came into being. Shu and Tefnut were united, and their offspring were Keb, the Earth-god, and Nut, the Sky-goddess. We have now five gods in existence; Khepera, the creative principle, Shu, the atmosphere, Tefnut, the waters above the heavens, Nut, the Sky-goddess, and Keb, the Earth-god. Presumably about this time the sun first rose out of the watery abyss of Nu, and shone upon the world and produced day. In early times the sun, or his light, was regarded as a form of Shu. The gods Keb and Nut were united in an embrace, and the effect of the coming of light was to separate them. As long as the sun shone, i.e., as long as it was day, Nut, the Sky- goddess, remained in her place above the earth, being supported by Shu; but as soon as the sun set she left the sky and gradually descended until she rested on the body of the Earth-god, Keb. [FN#4] Pepi I., l. 466.